Morten St George Theory

[-JKP-]

OK. I imagine a king can provide instruction if he so wishes. But you still need to find a "VMS beret" elsewhere. There are several of them in the VMS and I think it remains our best chance to identify the VMS authors.

Berets are mostly found in France in the medieval period (there are a few in Germany and Switzerland, as well, but not as many). I don't have time to upload the examples, but here is one I was able to grab quickly, from the Tübingen Hausbuch (which is German). It's not quite as poofy as some of them:

   

It could probably also be argued that the VMS hat is an oversimplified turban style (wrapped fabric), but it's drawn more like a beret than like a turban, so it's hard to know for sure.

Here's what I mean by turban-style. If this were a greatly simplified drawing (so the wrappings in the fabric aren't included) and the bump in the middle were raised, it might look a bit like a poofy beret:

   

I'm leaning toward the VMS hat being a beret. The only reason I'm considering the turban is because the beret shape is poofier than most. But... the sock hat (worn by Sagittarius) has an especially long tail, so maybe it's not out of character for the beret to have an especially poofy brim. Extra fabric was often a display of wealth in the Middle Ages.